TAMPA - In a classroom at Phillip Shore Elementary in Ybor City, 22 girls work together. The 5th graders, share ideas, listen to each others' thoughts and generally get along. "They've learned how to have relationships with other girls. Instead of that constant competitiveness, they are really a tight knit family," said Angela Nerti, their teacher. That may not seem like a big deal. But their teacher says in most co-ed classes, girls hold back. "They lose their focus a lot more because they try to impress the boy in the class instead of just focusing on what we're asking...